The ruler that was driven out of Lagos by the British was

Explanation

During his reign, Oba Kosoko became the Oba of Lagos in 1845 after plotting a coup against Oba Akintoye. During his reign the British came to him to sign the treaty to stop slavery but Kosoko insisted not to sign the treaty then Lagos was bombarded by the British Navy thereby driving Oba Kosoko out and reinstalling Oba Akintoye as the Oba in 1851.